content: reinstate instructions for running locally

This was lost in the conversion from HTML to present format in
6cf2ff.

Fixes golang/go#12134

Change-Id: I58a16ceb4a5edfbccb9733c3df2d409022bb6ffa
Reviewed-on: https://go-review.googlesource.com/15652
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/content/welcome.article b/content/welcome.article
index c0c5f45..9d71765 100644
--- a/content/welcome.article
+++ b/content/welcome.article
@@ -66,6 +66,25 @@
 
 Click the [[javascript:highlightAndClick(".next-page")]["next"]] button or type `PageDown` to continue.
 
+#appengine: * Go offline
+#appengine: 
+#appengine: This tour is also available as a stand-alone program that you can use
+#appengine: without access to the internet.
+#appengine: 
+#appengine: The stand-alone tour is faster, as it builds and runs the code samples
+#appengine: on your own machine.
+#appengine: 
+#appengine: To run the tour locally first [[http://golang.org/doc/install/][install Go]]
+#appengine: then use [[http://golang.org/cmd/go/][go get]] to install
+#appengine: [[http://golang.org/x/tour/][gotour]]:
+#appengine: 
+#appengine: 	go get golang.org/x/tour/gotour
+#appengine: 
+#appengine: and run the resultant `gotour` executable.
+#appengine: 
+#appengine: 	cd $GOPATH/bin
+#appengine: 	./gotour
+
 #appengine: * The Go Playground
 #appengine: 
 #appengine: This tour is built atop the [[http://play.golang.org/][Go Playground]], a